Airtight Workshop Ventilation
I am in the process of renovating an existing garage in Seattle, Climate Zone 4C. The foundation, floor, and walls are all poured concrete. I have recently re-built the roof, which is now sheathed, taped, and rigorously air-sealed.
My half of the garage is approximately 9’x20′; it will be insulated and used as a woodshop. I plan to use a ceiling mounted unit heater and may need a dehumidifier as well. Other than the custom carriage doors I will build on one end, there are no windows, doors, or other penetrations planned for the structure (I want to maximize workspace and wall storage).
My question is regarding fresh air and ventilation. I will likely be storing finishes, glues, and other solvents in this space, not to mention using them when finishing projects. I have seen in other similar posts a recommendation for using a 100cfm bath fan for discharging polluted air. I could monitor the air quality in the shop, crack one of the doors, and simply run as needed (or when working with finishes). Would this be sufficient for this small space? Are there other issues I should consider?
I should mention that I always wear a respirator when working with wood in enclosed spaces, and I use organic cartridges when working with solvents. I don’t want to create an unhealthy work environment, but I also don’t want to go overboard for a space that will only see intermittent use.
Thanks to those who have posted on this subject before. Any input here would be greatly appreciated.
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